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2.3 Petrol P1408

570 views 0 replies 1 participant last post by  siacelestar 
#1 ·
Seeking help.... 08 Mk4 2.3 Petrol auto..

After changing the engine mount and disconnected the battery for inspecting the transmission mount, when started up the car went lumpy at idle, slow picking up speed and smell of unburnt fuel from the exhaust. Forscan showed no error but when doing KOER test P1408 - EGR out of self-test range.

Cleaned the EGR valve and tested with a new valve but no help - same message still came up everytime. Although with the cleaned EGR valve it actually runs fine - still got white smoke out of the tailpipe but that's probably due to the gasket leaking so new one is on the way.

What could the 'out of self test range' be caused by? I am thinking it could be some sensor being dirty and carboned up (throttle body also cleaned as it was quite carboned up) but the only sensor that's in the air flow would be the two HEGO sensors down on the exhaust side as there seems to be no sensor on the intake side...

Thanks in advance!
 
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